Hydrogen telluride
colorless highly toxic gas
Hydrogen telluride, also known as hydrotelluric acid, tellane, or tellurium hydride, is a chemical compound. It is also an acid. Its chemical formula is H2Te. It contains hydrogen and telluride ions.
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Names | |||
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IUPAC name
hydrogen telluride
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Other names
hydrotelluric acid
tellane tellurium hydride | |||
Identifiers | |||
ECHA InfoCard | 100.029.073 | ||
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |||
H2Te | |||
Molar mass | 129.6158 g mol−1 | ||
Appearance | colourless gas | ||
Density | 3.310 g/cm3, gas 2.57 g/cm3 (-20 °C, liquid) | ||
Melting point | −49 °C (224 K) ( [1] | ||
Boiling point | −2.2 °C (271.8 K)(unstable above -2 °C) | ||
0.70 g/100 mL | |||
Acidity (pKa) | 2.6 | ||
Structure | |||
bent | |||
Thermochemistry | |||
Std enthalpy of formation ΔfH |
0.7684 kJ/g | ||
Hazards | |||
Main hazards | toxic | ||
Related compounds | |||
Other anions | {{{value}}} | ||
Other cations | {{{value}}} | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
Infobox references | |||
Properties
changeHydrogen telluride is a toxic reactive gas. It easily decomposes to hydrogen and tellurium. It also burns in air to make tellurium dioxide and water. It has a very bad smell of decayed garlic. It is almost as acidic as phosphoric acid. It reacts with some metals and metal oxides to make tellurides.
Preparation
changeIt is made by adding a strong acid to a telluride, such as sodium telluride.
Uses
changeHydrogen telluride does not have many uses because it is very toxic and unstable.
Related pages
changeSources
change- ↑ Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.